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tlv: Add sorting of the tlvstream

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So far we didn't need this since we were adding them in the correct
order. Now we have multiple possible origins so we better sort them.
This commit is contained in:
Christian Decker 2021-06-17 18:21:27 +02:00 • committed by Rusty Russell
parent 45607577b9
commit aba9af9e12
2 changed files with 11 additions and 2 deletions
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11
wire/tlvstream.c
View file

@ -1,5 +1,6 @@
#include "config.h"
#include <assert.h>
#include <ccan/asort/asort.h>
#include <common/bigsize.h>
#include <wire/tlvstream.h>
#include <wire/wire.h>
@ -8,11 +9,19 @@
#define SUPERVERBOSE(...)
#endif
void towire_tlvstream_raw(u8 **pptr, const struct tlv_field *fields)
static int tlv_field_cmp(const struct tlv_field *a, const struct tlv_field *b,
void *x)
{
return a->numtype > b->numtype ? 1 : -1;
}
void towire_tlvstream_raw(u8 **pptr, struct tlv_field *fields)
{
if (!fields)
return;
asort(fields, tal_count(fields), tlv_field_cmp, NULL);
for (size_t i = 0; i < tal_count(fields); i++) {
const struct tlv_field *field = &fields[i];
/* BOLT #1:

2
wire/tlvstream.h
View file

@ -28,7 +28,7 @@ struct tlv_field {
};
/* Given any tlvstream serialize the raw fields (untyped ones). */
void towire_tlvstream_raw(u8 **pptr, const struct tlv_field *fields);
void towire_tlvstream_raw(u8 **pptr, struct tlv_field *fields);
/* Given a tlv record with manually-set fields, populate ->fields */
#define tlv_make_fields(tlv, type) \